Corporate Profile
As of June 26, 2026
| Corporate name | Onoken Co., Ltd. |
|---|---|
| Established | August 11, 1949 |
| Headquarters | 12-1 Nishi-Minatomachi, Kokura Kita-ku, Kita-Kyushu-shi, Japan |
| Phone: | +81 93 561 0036 |
| Paid-in capital | 6,947,631,433 yen |
| Number of employees | 994 (consolidated: 1,235) |
| Main businesses | Sale, processing, and import/export of steel Sales of ironware and construction materials Civil engineering and construction contracting Real estate sale, leasing, and related businesses |
| Authorization, licensing, and registration | Specified construction industry License (Toku-29) No. 8648 granted by Japan's Ministry of Land, Infrastructure and Transport |
| Group Companies | Nishi-nippon Steel Center Co., Ltd. http://www.s-center.co.jp Sankyo Noritake Steel Co., Ltd. https://sankyo-kgy.com/ Onoken Okinawa Co., Ltd. https://www.onoken-okinawa.com/ Yamasa Co., Ltd. http://www.kk-yamasa.jp/index.html Onoken Steel Co., Ltd. https://okinaga-k.jimdofree.com/ Morita Kozai Co., Ltd. http://www.moritakozai.co.jp/ SANPO KOUGYOU Co., Ltd. https://sanpo-kougyou.com/ MARUMI KOSHO Co., Ltd. https://marumi-steel.co.jp/ Sanyu Kozai K.K. https://sunyou-kk.com/ Bright Ltd. Obayashi Shokai Co., Ltd. Matsuo Metal Co., Ltd. Chuo Kozai Co., Ltd. |
Director
As of June 26, 2026
| Title | Name |
|---|---|
| Representative Director | Takeshi Ono |
| Representative Director | Tetsuji Ono |
| Representative Director | Shinsuke Ono |
| Outside Director | Koichi Fukuda |
| Outside Director | Kazuhiro Harada |
| Director Full-Time Audit and Supervisory Committee Member |
Yoshiko Miyamoto |
| Outside Director Part-Time Audit and Supervisory Committee Member |
Hisakazu Umeda |
| Outside Director Part-Time Audit and Supervisory Committee Member |
Tomoko Ogura |
Management Team
As of June 26, 2026
| Title | Name (Names with an asterisk (*) serve concurrently as a Director) | Responsibilities |
|---|---|---|
| President (Representative Director) | Takeshi Ono* | |
| Executive Managing Director (Representative Director) General Manager of Management Control Division | Tetsuji Ono* | In charge of Kyushu and Okinawa region |
| Senior Managing Executive Officer | Shinsuke Ono* | In charge of Kansai and Chukyo region and General Manager of Osaka Branch Office |
| Executive Officer | Akira Ono | Director Development Office Manager |
| Executive Officer | Takumi Yamanaka | In charge of Chugoku and Shikoku region and General Manager of Hiroshima Branch Office |
| Executive Officer | Sota Kitazawa | General Manager of Management Control Division and General Manager of Management Planning Office |
| Executive Officer | Hiroyuki Murakami | In charge of Kanto and Tohoku region, General Manager of Tokyo Branch Office, and General Manager of Sendai Branch Office |
Organization Chart
Group Companies
Sankyo Noritake Steel Co., Ltd.
| Address | 1-5-8, Chikkoshinmachi, Nishi-ku, Sakai-shi, Osaka 592-8331, Japan |
|---|---|
| Phone | +81 72-280-1190 |
| Fax | +81 72-280-1195 |
| Main businesses | Sale and processing of hot-rolled, checkered, pickled and surface-treated steel plates (levelling, shearing) |
| Corporate site | https://sankyo-kgy.com/ |
Nishinippon Steel Center Co., Ltd.
| Address | 13-1, Nishiminatomachi, Kokurakita-ku, Kitakyushu-shi, Fukuoka 803-0801, Japan |
|---|---|
| Phone | +81 93-581-2131 |
| Fax | +81 93-592-6468 |
| Main businesses | Levelling, shearing and processing of steel plates Shearing and processing of steel plates |
| Corporate site | http://www.s-center.co.jp/ |
Onoken Okinawa Co., Ltd.
| Address | Kokuba Building 8F, 3-21-1, Kumoji, Naha-shi, Okinawa 900-0015, Japan |
|---|---|
| Phone | +81 98-860-9015 |
| Fax | +81 98-862-8337 |
| Main businesses | Sale, processing and import/export of steel Sale of ironware and construction materials Contractor for construction work Civil engineering and construction contracting |
| Corporate site | https://www.onoken-okinawa.com/ |
Yamasa Co., Ltd.
| Address | 4994, Godaisan, Kochi-shi, Kochi 781-8125, Japan |
|---|---|
| Phone | +81 88-883-4211 |
| Fax | +81 98-862-8337 |
| Main businesses | Sale of steel and civil engineering construction materials; civil engineering and architectural design and construction |
| Corporate site | http://www.kk-yamasa.jp/index.html |
Onoken Steel Co., Ltd.
| Address | 1-34-61, Dejima, Minami-ku, Hiroshima-shi, Hiroshima 734-0013, Japan |
|---|---|
| Phone | +81 82-255-9550 |
| Fax | +81 82-255-9553 |
| Main businesses | Processing and sale of steel plates |
| Corporate site | https://okinaga-k.jimdofree.com/ |
Morita Kozai Co., Ltd.
| Address | 1-11-5 Shimagashira, Kadoma-shi, Osaka 571-0016, Japan |
|---|---|
| Phone | +81 72-886-0012 |
| Fax | +81 72-886-0014 |
| Main businesses | Sale and processing of deformed steel bars for steel-reinforced concrete, and steel reinforcement work |
| Corporate site | http://www.moritakozai.co.jp/ |
SANPO KOUGYOU Co., Ltd.
| Address | 5-1-3, Kitagawara, Itami-shi, Hyogo 664-0837, Japan |
|---|---|
| Phone | +81 72-773-7650 |
| Fax | +81 72-773-7651 |
| Main businesses | Sale and processing of deformed steel bars; reinforcement work |
| Corporate site | https://sanpo-kougyou.com/ |
Bright Ltd.
| Address | (Within Onoken Co., Ltd. Fukuoka Branch) 4-12-11 Hakozakifutou, Higashi-ku, Fukuoka-shi 812-0051, Japan |
|---|---|
| Phone | +81 92-651-6513 |
| Fax | +81 92-631-0439 |
| Main businesses | Construction of exterior walls |
Obayashi Shokai Co., Ltd.
| Address | 1005, Yokawacho Kinkai, Miki-shi, Hyogo 673-1232, Japan |
|---|---|
| Phone | +81 794-72-1102 |
| Fax | +81 794-72-1271 |
| Main businesses | Processing and sale of steel |
Matsuo Metal Co., Ltd.
| Address | 459-2, Enzacho, Takamatsu-shi, Kagawa 761-8044, Japan |
|---|---|
| Phone | +81 87-885-2767 |
| Fax | +81 87-885-2693 |
| Main businesses | Sale and processing of stainless steel, copper, and aluminum |
Chuo Kozai Co., Ltd.
| Address | 8-1-91, Nankohigashi, Suminoe-ku, Osaka 559-0031, Japan |
|---|---|
| Phone | +81 6-6612-0565 |
| Fax | +81 6-6614-0996 |
| Main businesses | Steel flame cutting and shearing |
MARUMI KOSHO Co., Ltd.
| Address | 77, Wakamiya, Shimojicho, Toyohashi-shi, Aichi 440-0083, Japan |
|---|---|
| Phone | +81 532-53-7311 |
| Fax | +81 532-53-7318 |
| Main businesses | Processing and sale of steel products |
| Corporate site | https://marumi-steel.co.jp/ |
Sanyu Kozai K.K.
| Address | 2084-3, Mure, Mure-cho, Takamatsu-shi, Kagawa 761-0121, Japan |
|---|---|
| Phone | +81 87-845-2251 |
| Fax | +81 87-845-3252 |
| Main businesses | Sale of steel products |
| Corporate site | https://www.sunyou-kk.com/ |
